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基于虚拟介质层的直线滚动导轨结合部动态特性分析
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Dynamic Characteristics Analysis of Joint of Linear Rolling Guide Based on Virtual Medium Layer
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    摘要:

    为了更方便更精确地模拟直线滚动导轨的动态特性,提出采用虚拟介质层来建立直线滚动导轨结合部动力学模型,使用赫兹接触理论和Palmgren经验公式推导出虚拟介质层的材料属性和厚度等参数的解析解,然后将得到的虚拟介质层特征参数导入ANSYS中进行有限元模态分析,对比有限元模态分析与试验模态分析前6阶固有频率和相应的振型。对比结果表明,有限元模态分析的固有频率与试验结果相对误差在-2.5%~9.3%之间,验证了虚拟介质方法建模的有效性,为进一步建立数控机床整机的动力学模型奠定了基础。

    Abstract:

    In order to more convenient and more accurate simulate the dynamic characteristics of linear rolling guide, using of virtual medium layer was proposed to establish the dynamic model of the joint of linear rolling guide. Hertz contact theory and the experience formula of Palmgren were used to derive out the parsed solution of nvirtual parameters of virtual medium layer, such as the material properties and thickness. Then, the obtained parameters were imported into ANSYS to begin the finite element modal (FEM) analysis. The FEM analysis and experiment modal analysis were compared in the first six order natural frequency and the corresponding formation. Comparison results show that the natural frequency of the FEM analysis and test results of relative error is between -25%~93%, which verifies the effectiveness of the method of modeling of virtual meduim, and lays the foundation for the whole machine of the numercial control (NC) machine tool for further dynamics modeling. 

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李钦奉,李坤,周瑞,朱旺成.基于虚拟介质层的直线滚动导轨结合部动态特性分析[J].机床与液压,2015,43(21):168-171.
. Dynamic Characteristics Analysis of Joint of Linear Rolling Guide Based on Virtual Medium Layer[J]. Machine Tool & Hydraulics,2015,43(21):168-171

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  • 在线发布日期: 2016-01-08
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